code: def test_bias_dims_scalar(self):
      def f():
          mod = bias.Bias(bias_dims=())
          return mod(jnp.ones([1, 2, 3, 4]))
  
      params = transform.transform(f).init(None)
      self.assertEmpty(params["bias"]["b"].shape)
  
file_path: dm-haiku/haiku/_src/bias_test.py
imports: from absl.testing import absltest
  from haiku._src import bias
  from haiku._src import test_utils
  from haiku._src import transform
  import jax.numpy
  import numpy
label_desc: Use image node_id 3 for calling the BiasTest obj's underlying member method code with example usage: obj.test_bias_dims_scalar() and returns: mod